Why Does my S5 Active Think it Has no Storage Left on the Phone?

I have an s5 active, which I have been using in airplane mode only for the last 8 months, I haven't downloaded any new apps except one news reader, crossword puzzle, hexic2048, Lookout and WhatsApp.

I tried downloading my gmail emails and it told me I have no space left on my phone.

Hooked my phone up to my computer to look at the file structure. It tells me that I have only 328mb left on the phone.
However when I go into the phone (when I open the phone folder structure, as opposed to the memory card folders), and I right click on the sumtotal of all files, it tells me that I only have 52.8mb used.

I planned on manually transferring the files from the phone to the memory card or to my computer once it was hooked up, but this makes no sense.

Is this...I dunno...a virus that's tricking my phone into thinking its running out of space?
I am not very familiar with Android file systems. I do know Windows. It's probably likely that I am not looking in the correct folder for the bulk of the data that is taking up all the space on my phone.

I don't think it's a virus. Probably an app mis reporting storage use. I would suggest this, pull any media you want to keep from the phone and delete that. That might free up more space than you realize.

I don't think it's a virus. Probably an app mis reporting storage use. I would suggest this, pull any media you want to keep from the phone and delete that. That might free up more space than you realize.

Yup. That's what I was looking for. The math checks out. The Miscellaneous is kind of big, but I don't know what could be in there. I'm not exactly sure what to suggest. Maybe removing some apps you don't use anymore?

I'm trying to reply to whom told u to open misc. files to see what they are then delete what don't need. But I guess it goes on same page ? You can not open the files I've tried to see what each folder has in it but they don't open. So how do u know what to delete or what will mess up apps or make photos or mes. disappear How do u know My ph. has been out of storage since 2 mon. old I can't update I don't play games do unload anything watch movies listen to music Most of my storage / files apps show very little space or data yet I have 0.89MBs left in free? ph is only 8 mons old